ISSUE:
Whether the victim's act in self injecting the injection was an intervening act such as to break the chain of causation?
RULE:
The criminal law generally assumes the existence of free will. The law recognizes certain exceptions, in the case of the young, those who for any reason are not fully responsible for their actions, and the vulnerable, and it acknowledges situations of duress and necessity, as also of deception and mistake. But, generally speaking, informed adults of sound mind are treated as autonomous beings able to make their own decisions how they will act, and none of the exceptions is relied on as possibly applicable in this case.